the PCB is likely the culprit

5" Imaging Coil being ideal for deep-buried treasures and the 9

Comfortable headband and ear cushions for long wear

such as the 8" or 11" Monoloop coils

TreasureHound Coil: Designed for deep detection of larger objects buried at greater depths

Fisher Gold Bug Pro Compact Coil Edition High Sensitivity Metal Detector Bundle With 2 Coils Type_Super D the PCB is likely theFisher Gold Bug Pro Compact Coil Edition (GOLDBUG PRO CC) The Fisher Gold Bug Pro Compact Coil Edition is a high accuracy gold prospecting detector engineered to locate the smallest gold nuggets in difficult, mineral rich ground. Operating at a powerful 19 kHz frequency, this detector delivers exceptional sensitivity to fine gold while remaining lightweight, stable, and easy to operate. Key Features Of The Fisher Gold Bug Pro CC High Sensitivity 19